Ecco The Dolphin: Defender of The Future - PS2

Game Description:As a super-intelligent dolphin named Ecco, you'll explore gorgeous underwater seascapes -- along with saving the world from alien and traveling through time. You'll fight off turtles, sharks, and alligators and travel through environments like shipwrecks and sunken spacecraft. To find your way around you'll use your sonar, with special gems emitting signals for you to follow. The PS2 version is largely unaltered from the original but new features include a mission map and the ability to home in on your next objective.